Method and arrangement for connectivity in a communication network

ABSTRACT

Method and arrangement for supporting connectivity of a wireless device to a network infrastructure. An infrastructure provider associates a set of device identification numbers to a first radio access provider in a subscription database of the infrastructure provider. The infrastructure provider also sets the first radio access provider as a preferred roaming partner in a SIM that comprises a subscriber identifier with a network identifier of the infrastructure provider. The SIM is provided for use in the device, to enable access to the network infrastructure over a radio access network of the first radio access provider based on the subscriber identifier and the preferred roaming partner in the SIM.

TECHNICAL FIELD

The invention relates generally to a method and arrangement forsupporting connectivity of devices in a mobile communications network.

BACKGROUND

In the field of mobile communication, a great range of new communicationdevices and services have recently been developed and introduced on themarket. Consequently, different devices have different capabilities andneeds for using services and also require different types ofconnectivity to communication networks, e.g. depending on requirementsrelated to bandwidth, quality and delays. The communication devices oftoday include anything from advanced user equipments with many functionsand great computer capacity, to very simple so-called “M2M”(Machine-to-Machine) devices e.g. configured to automatically providestatus reports or measurements to a central enterprise. In thisdevelopment, the need for differentiated subscription models hasincreased to suit such different needs and requirements.

It is also common that multiple network operators are active in the sameregion operating their own more or less geographically overlappingnetworks using proprietary equipment, services and functionality,although mostly based on standardised products and protocols. However,some operators may share certain basic equipment such as communicationlinks, power supply, cabinets and antenna towers, in order to reducetheir investment and operational costs. Moreover, it has been proposedthat multiple radio access networks of different operators can utilizethe same infrastructure in terms of core network functions apart fromradio access functions, including resources for e.g. switching, controland signaling, links, routers, gateways, processors, subscriptiondatabases, as well as nodes for IP (Internet Protocol) connectionestablishment, policy enforcement, diagnostics, etc. For example, an SS7signaling network can be employed in the infrastructure to be re-used byall the radio access networks.

Effectively, operators of the radio access networks, which in thisdescription will be referred to as “radio access providers”, can hireinfrastructure resources according to a range of subscription modelsfrom a network infrastructure when providing communication services fortheir subscribers, without having to invest in such equipmentthemselves. Further, the term “device” represents any communicationentity capable of radio communication over a mobile access network, e.g.mobile telephones, computers, M2M devices, etc.

FIG. 1 illustrates an exemplary scenario where such a shared networkinfrastructure 100 is used by multiple radio access providers havingtheir radio access networks or “RANs” 102 connected to a GGSN (GatewayGPRS Support Node) of the infrastructure 100. Each RAN 102 may includean SGSN (Serving GPRS Support Node), not shown, configured to routecommunications to the GGSN of infrastructure 100. In this illustration,an enterprise 104 owns an M2M device “D” which is able to communicatewith the enterprise 104, e.g. for automatically sending status ormeasurement reports thereto, over any of the RANs 102 and theinfrastructure 100.

In this arrangement, the infrastructure 100 has disposal of a number ofsubscriber identifiers normally referred to as IMSI (InternationalMobile Subscriber Identifier) numbers, which can be provisioned insubscriber modules, e.g. SIM (Subscriber Identity Module) cards, to beinstalled in the devices for unique identification of the devices whencommunicating. An IMSI number is normally formed as “MCC+MNC+MSIN”,where MCC is a Mobile Country Code of three digits, MNC is a MobileNetwork Code of two or three digits, and MSIN is a Mobile SubscriberIdentification Number of a maximum of ten digits.

The radio access providers are thus “customers” with the infrastructureand subscriber modules provisioned with IMSI numbers are supplied to theradio access providers associated with subscriptions which arespecifically configured for certain types of devices requiring specificresources in the infrastructure. The subscriptions can thus be“tailor-made” to suit specific types of devices and/or enterprises. Theradio access providers are then in turn able to sell such subscriptionsand corresponding subscriber modules to their customers, i.e. end-usersand enterprises having one or more devices.

However, it has been recognized as a problem that using the givenstructure of IMSI numbers above, the devices will not always attach tothe correct radio access network, e.g. the “home” network, and at thesame time be connected to the shared network infrastructure. If the MNCin an IMSI number used by a device identifies the infrastructure, ascurrently proposed for such shared infrastructures, the device will bedirected thereto but may on the other hand attach to any radio accessnetwork which may not be the correct one. As a result, the device willeffectively roam by attaching to other, or “visited”, networks whichgenerates undue costs.

SUMMARY

It is an object of the invention to address at least some of theproblems and issues outlined above. It is possible to achieve theseobjects and others by using a method and an arrangement as defined inthe attached independent claims.

According to one aspect, a method is provided in an infrastructureprovider for supporting connectivity of a wireless device to a networkinfrastructure. In this method, the infrastructure provider associates aset of device identification numbers, e.g. MSINs, to a first radioaccess provider in a subscription database of the infrastructureprovider, and sets the first radio access provider as a preferredroaming partner in a subscriber module, e.g. a SIM. A subscriberidentifier, e.g. IMSI, in the subscriber module includes at least anetwork identifier, e.g. MNC, of the infrastructure provider and one ofthe device identification numbers associated to the first radio accessprovider. The subscriber module is also provided for use in saidwireless device. Thereby, access to the network infrastructure over aradio access network of the first radio access provider is enabled inthe wireless device based on the subscriber identifier and the preferredroaming partner in the subscriber module.

According to another aspect, an arrangement is provided in aninfrastructure provider configured to support connectivity of wirelessdevices to a network infrastructure. This infrastructure providerarrangement comprises an associating module adapted to associate a setof device identification numbers to a first radio access provider in asubscription database of the infrastructure provider. The arrangementalso comprises a configuring module adapted to set the first radioaccess provider as a preferred roaming partner in a subscriber module. Asubscriber identifier in the subscriber module includes at least anetwork identifier of the infrastructure provider and one of the deviceidentification numbers associated to the first radio access provider.

The arrangement also comprises a providing module adapted to provide thesubscriber module for use in the wireless device. Access to the networkinfrastructure over a radio access network of the first radio accessprovider is enabled in the wireless device based on the subscriberidentifier and the preferred roaming partner in the subscriber module.

The above method and arrangement may be configured and implementedaccording to different embodiments. In one possible embodiment, theinfrastructure provider enables the wireless device to attach to thefirst radio access provider according to the preferred roaming partnerin the subscriber module, and further enables the first radio accessprovider to direct the wireless device to the network infrastructurebased on the network identifier included in the subscriber identifier inthe subscriber module. In another possible embodiment, theinfrastructure provider enables the network infrastructure to charge thefirst radio access provider, or vice versa, for any services used by thedevice, by mapping the device identification number in the subscriberidentifier to the first radio access provider according to theassociation made in the subscription database. In another possibleembodiment, the infrastructure provider enables the networkinfrastructure to authenticate the device based on the deviceidentification number which has been associated to the first radioaccess provider in the subscription database and is also included in thesubscriber identifier in the subscriber module.

In another embodiment, the infrastructure provider may set the firstradio access provider as a preferred roaming partner in the subscribermodule and provide the subscriber module to the first radio accessprovider, in response to a request from the first radio access providerfor one or more subscriber modules. Further, at least one of the aboveactions of associating, setting and provisioning may be executed overthe air after the subscriber module has been provided for use in thewireless device.

The preferred roaming partner in the subscriber module may be changedover the air by setting a second radio access provider as the preferredroaming partner, in which case the infrastructure provider alsoassociates the device identification number in the subscriber identifierto the second radio access provider in the subscription database.Thereby, the first radio access provider can be replaced by the secondradio access provider for that device in a neat manner.

It is further possible that the infrastructure provider associatesdifferent sets of device identification numbers to different radioaccess providers in the subscription database, and sets the differentradio access providers as preferred roaming partners in furthersubscriber modules. In that case, subscriber identifiers in said furthersubscriber modules include the network identifier, to enable access tothe infrastructure over corresponding radio access networks by means ofthose subscriber modules.

Further possible features and benefits of this solution will becomeapparent from the detailed description below.

BRIEF DESCRIPTION OF DRAWINGS

The invention will now be described in more detail by means of exemplaryembodiments and with reference to the accompanying drawings, in which:

FIG. 1 is an overview of how a shared infrastructure can be used,according to the prior art.

FIG. 2 is a block diagram illustrating a communication scenario where aninfrastructure provider is used for supporting connectivity of awireless device, according to some possible embodiments.

FIG. 3 is a schematic illustration of a subscriber module, according toa possible embodiment.

FIG. 4 is a flow chart with actions performed by an infrastructureprovider, according to another possible embodiment.

FIG. 5 is a block diagram illustrating an exemplifying infrastructureprovider in more detail, according to further possible embodiments.

DETAILED DESCRIPTION

Briefly described, the invention can be used to support connectivity fordevices to a shared network infrastructure without generating unduecosts associated with roaming to a visited radio access network. Thissolution can be implemented and realised in an entity called“infrastructure provider” in the following, which could be a server orany kind of suitable control node associated with the networkinfrastructure, e.g. distributed over more than one physical node orentity, and the invention is not limited in this respect.

By dividing a range of device identification numbers, e.g. MSINs, intodifferent sets, e.g. intervals, which are assigned or associatedexclusively to different radio access providers, i.e. network operators,those device identification numbers can be used to identify the properradio access provider of a device when the device uses a subscribermodule, e.g. SIM, provisioned with one of the corresponding set ofdevice identification numbers. For example, a range of MSINs 000-299 maybe assigned to a first radio access provider, while another range ofMSINs 300-499 may be assigned to a second radio access provider, and soforth. Here, the “proper” radio access provider is thus the one havingsold or otherwise provided a subscription with the subscriber module tothe owner or controller of the device, e.g. a person, company,corporation, enterprise, organization or the like. In the following, theterm “device owner” is used to represent any of the above examples orany other party that controls a device using a subscriber moduleaccording to this solution.

Further, by setting the proper radio access provider of a subscriber inan existing parameter of the subscriber module called “preferred roamingpartner”, the device will accordingly try to attach to the accessnetwork of that radio access provider, whenever possible in terms ofradio coverage, instead of attaching to any visited network, therebyavoiding roaming and associated costs. The device identification number,e.g. MSIN, is included in a subscriber identifier, e.g. IMSI, which isprovisioned in the subscriber module. The subscriber identifier alsoincludes a network identifier, e.g. MNC, of the infrastructure providersuch that the device will accordingly be directed by the access networkfurther to the infrastructure as desired to utilise resources therein.

By also associating the device identification number of the device tothat radio access provider in a subscription database, e.g. HLR, of theinfrastructure, the device can be authenticated by the infrastructure toallow its services for the device. The proper radio access provider mayalso be charged by the infrastructure for any services used by thedevice, as the device identification number in the subscriber identifiercan be mapped to that radio access provider in the subscriptiondatabase. On the other hand, The infrastructure may be charged by theradio access provider for resources used by the device in the radioaccess network, and payments for used resources may go in eitherdirection depending on what agreement is employed between theinfrastructure the radio access provider.

Among other things, an additional advantage with this solution is thatthe home access network of the device can be changed quite easily bychanging the preferred roaming partner in the subscriber module over theair and associating the device identification number to the new radioaccess provider in the subscription database. The device willaccordingly try to attach to the new access network of that radio accessprovider who may also be charged by the infrastructure, or vice versa,for any services and resources used by the device according to thechanged association in the subscription database.

By this inventive configuration of the subscriber module, the devicewill attach to the correct radio access network whenever possible, andat the same time be directed to the shared network infrastructure to beserved with any needed network resources therein. Any unnecessaryroaming costs can be avoided while radio access providers can supply arange of different subscription models for their customers by utilisingthe shared network infrastructure without having to invest in the neededequipment themselves. The infrastructure provider is used to basicallyconfigure subscriber modules in the above manner, which will bedescribed further in the following.

In this description, a subscriber module may be any of: a physical SIM(Subscriber Identity Module) card or other module defined by softwareand/or hardware such as soft SIM, USIM (UMTS SIM), ISIM (IMS SIM), VSIM(Virtual SIM), MCIM (Machine Communication Identity Module), or smartcard adapted for installation in the device. Corresponding subscriberdata is provisioned and maintained in a subscription database of thenetwork infrastructure, e.g. an HLR or similar. Although it is common touse physical SIM cards in mobile terminals, this solution is not limitedthereto.

With reference to a communication scenario illustrated in FIG. 2, anexample of how connectivity can be supported for a wireless device D toa network infrastructure 200 in accordance with this solution, will nowbe described. The device D may be an M2M device that is configured tosend status reports or measurements to a central enterprise using thedevice for surveillance or the like, although the following descriptioncould just as well be applied for any other type of device and deviceowner. This solution is basically realised by means of an infrastructureprovider 200 a associated with the network infrastructure 200, asfollows. Although illustrated as a node outside infrastructure 200 forclarity, the infrastructure provider 200 a can in practice beimplemented as being part of the infrastructure 200, and the inventionis not limited in this respect.

In this example, the network infrastructure 200 is shared by at leastthree providers of radio access networks 202, indicated as RAN 1, RAN 2and RAN 3 in the figure. The network infrastructure 200 may have variousnetwork functions and resources to be hired by the radio accessproviders, e.g. as exemplified in the background above, in this caseincluding schematically illustrated GGSN/HLR functions 200 b forhandling communications to and from subscribers in the radio accessnetworks 202, the HLR thus being the subscription database in thiscontext. In practice, the GGSN and HLR functions may be implemented intwo separate nodes or in the same node.

Further, the infrastructure provider 200 a has disposal of a pluralityof subscriber identifiers, typically IMSIs with a range of MSIN numbers,e.g. MSIN000-MSIN999, which can be associated to individual subscribersin the HLR 200 b. In this solution, the device identification numbersMSIN000-MSIN999 are divided into distinct sets, e.g. intervals, whichare assigned and associated exclusively to different radio accessproviders and their networks 202, in order to mark which radio accessprovider a subscriber belongs to. Accordingly, a first shown action 2:1illustrates that infrastructure provider 200 a associates the differentsets of MSINs to RAN 1, RAN 2 and RAN 3, respectively, in HLR 200 b. Forexample, MSIN000-MSIN099 may be associated to RAN 1, MSIN100-MSIN199 maybe associated to RAN 2, MSIN200-MSIN299 may be associated to RAN 3, andso forth.

In a further action 2:2, infrastructure provider 200 a creates orconfigures subscriber modules SIMs for the different radio accessproviders and their networks 202. This action may be initiated byrequests or the like, not shown, from the individual radio accessproviders or performed anyway as a preparation procedure, depending onthe implementation. This action includes setting the respective radioaccess providers as a preferred roaming partner in the SIMs, to cause adevice using the SIM to attach to the proper RAN according to thepreferred roaming partner parameter in the SIM, which is customary forsuch devices.

This action 2:2 may also include configuring the subscriber identifiersIMSIs disposed by infrastructure provider 200 a in the SIMs, such thatthe IMSIs include a network identifier MNC of the infrastructureprovider 200 a, to cause the access providers of networks 202 to directany device using the SIM to the network infrastructure 200 based on theMNC in the IMSI, which is customary for such access providers.Alternatively, the IMSIs may already have been configured in the SIMsand can be used in the manner described here. The MNC thus identifiesthe network infrastructure 200 and thereby the infrastructure provider200 a. A device identification number MSIN is also included in thesubscriber identifiers IMSIs which the infrastructure can use forcharging the correct radio access provider, or vice versa, for anyservices or resources in the infrastructure 200 or radio access network,respectively, used by the device. Action 2:2 basically concludes a“configuration phase” of this solution. It should be noted that actions2:1 and 2:2 are basically independent of one another and may be executedin any order or at the same time.

The infrastructure provider 200 a also provides the created SIMs for usein wireless devices to enable access to the network infrastructure 200over a proper radio access network 202, to which the respective devicesbelong, based on the IMSI and the preferred roaming partner in each SIM.A next action 2:3 thus illustrates that a SIM, created for RAN 1 in thisexample according to the above, is provided to the operator (i.e. accessprovider) of RAN 1. The operator then offers the SIM to the owner ofdevice D, e.g. when selling and establishing a subscription for thedevice owner, and the latter is then able to insert the SIM into hisdevice D, shown by a following action 2:4.

In this example, the SIM is configured first and then delivered for useto the operator of RAN 1. However, it is also possible to provide theSIM with a preset IMSI and then when it has been inserted into thedevice the SIM can be configured remotely “over the air” by means ofsuitable radio messages from the infrastructure provider 200 a to thedevice D. For example, the infrastructure provider 200 a may use an IMSIin the SIM with a particular MSIN, and then associate that MSIN to afitting RAN in the HLR 200 b at any time. In other words, one or more ofthe above-described actions of associating an MSIN to a RAN in the HLR,setting the RAN as a preferred roaming partner in the SIM, andconfiguring the IMSI with the MNC and MSIN in the SIM, if not alreadydone, may be executed over the air after the SIM has been provided foruse in the wireless device.

When device D is activated with the SIM inserted, it will attempt toattach to RAN 1 according to the preferred roaming partner in the SIM,in an action 2:5 a, which is of course the proper network of device D.This way, the preferred roaming partner parameter in the SIM is utilizedto cause device D to attach to its own network, RAN 1 in this example,while RAN 1 is actually the “home” network and not a visited or roamednetwork. In turn, RAN 1 receiving the attach communication from device Dwill direct the device to the infrastructure 200 according to the MNC inthe IMSI of the SIM, in a further action 2:5 b. Thus, the networkidentifier MNC in the IMSI is utilized to cause the attached accessnetwork RAN 1 to direct device D to the network infrastructure 200, inthis example to the GGSN/HLR node 200 b.

Next, the GGSN/HLR node 200 b may authenticate the device D, illustratedschematically by a two-way dashed arrow of action 2:6, based on the IMSIconfigured in the SIM of the device and further based on the MSINassociation in the HLR 200 b. Device D can now execute communicationsover the attached RAN 1 and using network resources and services in thenetwork infrastructure 200. A next and final action 2:7 illustrates thatthe GGSN/HLR node 200 b charges RAN 1 in this example, for any servicesand resources in the network infrastructure 200 used by the device D, bymapping the MSIN in the IMSI of device D to RAN 1 according to theassociation made in the HLR in action 2.1.

If the user of device D wants to change home network at some point, forwhatever reason, this can be accomplished without exchanging the SIM fora new one, and even without removing it from the device. The preferredroaming partner in the SIM can be changed over the air by setting a newradio access provider, e.g. RAN 2, as the preferred roaming partner, andthe MSIN in the IMSI may also be associated to the new radio accessprovider RAN 2 in the HLR. As a result, the device will attach to thenetwork of RAN 2 according to the preferred roaming partner parameter inthe SIM and the infrastructure 200 will charge RAN 2 for services andresource usage by mapping the MSIN in the IMSI to RAN 2 according to thenew association in the HLR. As mentioned above, the radio accessprovider may charge the infrastructure instead, depending on theagreement employed.

An example of how a subscriber module can be configured to accomplishconnectivity of a wireless device to a network infrastructure shared bymultiple radio access providers, will now be described with reference toFIG. 3. In this case, the subscriber module is a SIM 300 for insertioninto the wireless device, e.g. as of action 2:4 above, and the SIM 300can be used in the manner described for FIG. 2 above. To avoid roamingto a visited radio access network and extra costs associated therewith,the SIM 300 is configured with a preferred roaming partner “RAN 1”pointing to the radio access network to which the device belongs bysubscription or similar. Thereby, the device will attach to its homenetwork according to this parameter, e.g. as of action 2:5 a above, ifpossible due to radio coverage among other things.

The SIM 300 is also configured with an IMSI which includes an MCC, anMNC and an MSIN according to the conventional IMSI structure. The MCCmay be used in a conventional manner which is outside the scope of thissolution. However, the MNC, which conventionally points to a home radioaccess network, in this case points to the network infrastructure “IS”instead. Thereby, the device will be directed by the attached network tothe IS, e.g. as of action 2:5 b above. The MSIN is one of a set of MSINsthat have been associated with RAN 1 in the subscription database (HLR)of the infrastructure provider, and thus points to the proper or homeradio access provider of the device. Thereby, the infrastructure can mapthe MSIN to RAN 1 and charge RAN 1 for services or resources used by thedevice, e.g. as of action 2:7 above.

A procedure for supporting connectivity of a wireless device to a sharednetwork infrastructure will now be described with reference to FIG. 4.This procedure includes various actions that may be executed by aninfrastructure provider such as the infrastructure provider 200 a inFIG. 2. This example refers to a “first” radio access provider, whichcould be any of a plurality of radio access providers sharing thenetwork infrastructure in question, such as any of RAN 1, RAN 2 and RAN3 in the above example. It should be noted that the actions in FIG. 4may be executed in any order depending on the implementation, e.g. asdescribed above for the preceding example of FIG. 2.

In a first shown action 400, the infrastructure provider associates aset of device identification numbers, e.g. MSINs, to a first radioaccess provider in a subscription database, e.g. HLR, of theinfrastructure provider. Differently expressed, a mapping is created inthe subscription database between the set of device identificationnumbers, to the first radio access provider. Corresponding associationsor mappings may also be created between other sets of deviceidentification numbers to different radio access providers sharing thenetwork infrastructure.

The infrastructure provider further creates or configures subscribermodules for different radio access providers, basically according to theconfiguration shown in FIG. 3. In a further action 402, theinfrastructure provider sets the first radio access provider as apreferred roaming partner in a subscriber module, e.g. SIM. In a furtheraction 404, the infrastructure provider uses a subscriber identifier,e.g. IMSI, in said subscriber module wherein the subscriber identifierincludes at least a network identifier, e.g. MNC, of the infrastructureprovider. The subscriber identifier further includes one of the deviceidentification numbers associated to the first radio access provider.

The infrastructure provider finally provides the subscriber module foruse in the wireless device, in a last shown action 406. Thereby, thewireless device is able to access the network infrastructure over aradio access network of the first radio access provider based on thesubscriber identifier and the preferred roaming partner in thesubscriber module, see also the above description of actions 2:5 a, 2:5b and 2:6.

The above procedure may be adapted or modified in different waysdepending on the implementation, apart from changing the order ofexecution. For example, the first radio access provider may be set as apreferred roaming partner in the subscriber module and the subscribermodule may be provided to the first radio access provider, once arequest for one or more subscriber modules is received from the firstradio access provider. Further, the network infrastructure is able toauthenticate the device for communication based on the deviceidentification number that was included in the subscriber identifier inthe subscriber module as of action 404, which has also been associatedto the first radio access provider in the subscription database as ofaction 400.

A more detailed but non-limiting example of how an arrangement can beimplemented in an infrastructure provider to accomplish theabove-described solution, is illustrated by the block diagram in FIG. 5.The infrastructure provider 500 is thus configured to supportconnectivity of a wireless device D to a network infrastructure, e.g. inthe manner described above for any of FIGS. 2-4.

According to this arrangement, the infrastructure provider 500 comprisesan associating module 500 a adapted to associate a set of deviceidentification numbers “MSINs” to a first radio access provider “RAN 1”in a subscription database “HLR” of the infrastructure provider. Theinfrastructure provider 500 further comprises a configuring module 500 badapted to set the first radio access provider as a preferred roamingpartner in a subscriber module “SIM”, wherein a subscriber identifier“IMSI” is included in the subscriber module SIM. The subscriberidentifier is configured to include at least a network identifier of theinfrastructure provider and one of the device identification numbersassociated to the first radio access provider. The infrastructureprovider 500 also comprises a providing module 500 c adapted to providethe subscriber module SIM, e.g. to an operator or the like, for use inthe wireless device D. Thereby, access to the network infrastructureover a radio access network of the first radio access provider isenabled in the wireless device based on the subscriber identifier andthe preferred roaming partner in the subscriber module SIM.

It should be noted that FIG. 5 merely illustrates various functionalmodules or units in the infrastructure provider 500 in a logical sense,although the skilled person is free to implement these functions inpractice using suitable software and hardware means. Thus, this aspectof the solution is generally not limited to the shown structures of theinfrastructure provider 500, while its functional modules 500 a-500 cmay be configured to operate according to the features described for anyof FIGS. 2-4 above, where appropriate.

The functional modules 500 a-500 c described above can be implemented inthe infrastructure provider 500 as program modules of a computer programcomprising code means which, when run by a processor “P” in theinfrastructure provider 500, causes the infrastructure provider 500 toperform the above-described functions and actions. The processor P maybe a single CPU (Central processing unit), or could comprise two or moreprocessing units. For example, the processor P may include generalpurpose microprocessors, instruction set processors and/or related chipssets and/or special purpose microprocessors such as ASICs (ApplicationSpecific Integrated Circuit). The processor P may also comprise astorage for caching purposes.

The computer program may be carried by a computer program product in theinfrastructure provider 500 in the form of a memory “M” connected to theprocessor P. The computer program product or memory M comprises acomputer readable medium on which the computer program is stored. Forexample, the memory M may be a flash memory, a RAM (Random-accessmemory), a ROM (Read-Only Memory) or an EEPROM (Electrically ErasableProgrammable ROM), and the program modules could in alternativeembodiments be distributed on different computer program products in theform of memories within the infrastructure provider 500.

The above infrastructure provider 500 and functional modules 500 a-500 cmay be configured or adapted to operate according to various optionalembodiments. For example, the configuring module 500 b and the providingmodule 500 c may be further adapted to set the first radio accessprovider as a preferred roaming partner in the SIM and provide the SIMto the first radio access provider, respectively, in response to arequest from the first radio access provider for one or more subscribermodules.

The infrastructure provider 500 may also be configured to execute atleast one of the actions of associating, setting and provisioning overthe air after the SIM has been provided for use in the wireless device.If the device user wants to change radio access provider, theconfiguring module 500 b may be further adapted to change the preferredroaming partner in the SIM over the air by setting a second radio accessprovider as the preferred roaming partner. In addition, the associatingmodule 500 a may in this case also be adapted to associate the MSIN inthe IMSI to the second radio access provider in the subscriptiondatabase HLR.

In another possible embodiment, the associating module 500 a may befurther adapted to associate different sets of device identificationnumbers MSINs to different radio access providers in the subscriptiondatabase HLR, while the configuring module 500 b may be further adaptedto set the different radio access providers as preferred roamingpartners and provision subscriber identifiers with the above networkidentifier MNC in further SIMs, to enable access to the infrastructureover corresponding radio access networks by means of said furthersubscriber modules.

While the invention has been described with reference to specificexemplary embodiments, the description is generally only intended toillustrate the inventive concept and should not be taken as limiting thescope of the invention. For example, the terms “network infrastructure”,“infrastructure provider”, “radio access provider”, “subscriberidentifier” and “network identifier” have been used throughout thisdescription, although any other corresponding nodes, functions, and/orparameters could also be used having the features and characteristicsdescribed here. The invention is defined by the appended claims.

The invention claimed is:
 1. A method in an infrastructure provider forsupporting connectivity of a wireless device to a networkinfrastructure, the method comprising: associating a set of deviceidentification numbers to a first radio access provider in asubscription database of the infrastructure provider, and setting thefirst radio access provider as a preferred roaming partner in asubscriber module, wherein a subscriber identifier in said subscribermodule includes at least a network identifier of the infrastructureprovider and one of the device identification numbers associated to thefirst radio access provider, wherein the subscriber module is providedfor use in said wireless device, and wherein access to the networkinfrastructure over a radio access network of the first radio accessprovider is enabled in the wireless device based on the subscriberidentifier and the preferred roaming partner in the subscriber module;wherein the wireless device is enabled to attach to the first radioaccess provider according to the preferred roaming partner in thesubscriber module, and the first radio access provider is enabled todirect the wireless device to the network infrastructure based on thenetwork identifier in the subscriber identifier; and wherein differentsets of device identification numbers are associated to different radioaccess providers in the subscription database, and the different radioaccess providers are set as preferred roaming partners in furthersubscriber modules, wherein subscriber identifiers in said furthersubscriber modules include said network identifier, to enable access tothe infrastructure over corresponding radio access networks by means ofsaid further subscriber modules.
 2. The method of claim 1, wherein thenetwork infrastructure is enabled to charge the first radio accessprovider, or vice versa, for any services used by the device, by mappingthe device identification number in the subscriber identifier to thefirst radio access provider according to the association made in thesubscription database.
 3. The method of claim 1, wherein the networkinfrastructure is enabled to authenticate the device based on the deviceidentification number associated to the first radio access provider inthe subscription database and included in the subscriber identifier insaid subscriber module.
 4. The method of claim 1, wherein the firstradio access provider is set as a preferred roaming partner in thesubscriber module and the subscriber module is provided to the firstradio access provider, in response to a request from the first radioaccess provider for one or more subscriber modules.
 5. The method ofclaim 1, wherein at least one of said actions of associating, settingand provisioning is executed over the air after the subscriber modulehas been provided for use in the wireless device.
 6. The method of claim1, wherein the preferred roaming partner in the subscriber module ischanged over the air by setting a second radio access provider as thepreferred roaming partner, and wherein the device identification numberin the subscriber identifier is associated to the second radio accessprovider in the subscription database.
 7. The method of claim 1, whereinthe step of setting the first radio access provider as a preferredroaming partner in a subscriber module comprises storing in thesubscriber module an identifier pointing to a single radio accessnetwork.
 8. An infrastructure provider system, for use by aninfrastructure provider, comprising: a subscription database; anassociating module adapted to associate a set of device identificationnumbers with a first radio access provider in the subscription database;a configuring module adapted to set the first radio access provider as apreferred roaming partner in a subscriber module, wherein saidsubscriber module includes a subscriber identifier that comprises: (i) anetwork identifier identifying a network infrastructure operated by theinfrastructure provider and (ii) one of the device identificationnumbers associated with the first radio access provider; wherein thewireless device is enabled to attach to the first radio access provideraccording to the preferred roaming partner in the subscriber module, andthe first radio access provider is enabled to direct the wireless deviceto the network infrastructure based on the network identifier in thesubscriber identifier; and wherein the associating module is furtheradapted to associate different sets of device identification numbers todifferent radio access providers in the subscription database, and theconfiguring module is further adapted to set the different radio accessproviders as preferred roaming partners, wherein subscriber identifiersin further subscriber modules include said network identifier, to enableaccess to the infrastructure over corresponding radio access networks bymeans of said further subscriber modules.
 9. The system of claim 8,wherein the network infrastructure is enabled to charge the first radioaccess provider, or vice versa, for any services used by the device, bymapping the device identification number in the subscriber identifier tothe first radio access provider according to the association made in thesubscription database.
 10. The system of claim 8, wherein the networkinfrastructure is enabled to authenticate the device based on the deviceidentification number associated to the first radio access provider inthe subscription database and included in the subscriber identifier insaid subscriber module.
 11. The system of claim 8, wherein theconfiguring module is further adapted to set the first radio accessprovider as a preferred roaming partner in the subscriber module inresponse to a request from the first radio access provider for one ormore subscriber modules.
 12. The system of claim 8, configured toexecute at least one of said actions of associating, setting andprovisioning over the air after the subscriber module has been providedfor use in the wireless device.
 13. The system of claim 8, wherein theconfiguring module is further adapted to change the preferred roamingpartner in the subscriber module over the air by setting a second radioaccess provider as the preferred roaming partner, and wherein theassociating module is further adapted to associate the deviceidentification number in the subscriber identifier to the second radioaccess provider in the subscription database.
 14. The system of claim 8,wherein the configuring module is adapted to set the first radio accessprovider as the preferred roaming partner in the subscriber module bystoring in the subscriber module an identifier pointing to a singleradio access network.